Accession Number : ADA116513

Title :   A Study of Cumulative Fatigue Damage in 2011-T3 Aluminum Alloy.

Descriptive Note : Technical rept. 15 May 80-14 Aug 81,

Corporate Author : TUSKEGEE INST ALA SCHOOL OF ENGINEERING

Personal Author(s) : Jeelani,Shaik ; Reddy,Purander A

PDF Url : ADA116513

Report Date : Aug 1981

Pagination or Media Count : 70

Abstract : This report describes the experimental facility developed at Tuskegee Institute, Tuskegee, Alabama, to study the effect of cumulative fatigue damage in selected materials. The equipment procured consists of direct tension-compression fatigue testing machines Model DS-600 HLM and DS-6000 HLM instrumented to conduct fatigue tests on Aluminum, steel and super alloys under various stress sequences. Specimen profiler, heat treatment furnace and electropolishing apparatus were purchased and/or developed for specimen preparation. Experimental data were generated using 2011-T3 aluminum alloy specimens under stress ratios R=-1, R=-0.5, and R=0, for low-high, low-high mixed, and high-low mixed stress sequences. Analysis of the data has indicated that the predicted cumulative fatigue damage and fatigue life are in close agreement for low-high and low-high mixed stress sequences under all stress ratios as compared with those obtained experimentally, whereas the theoretical values for high-low and high-low mixed stress sequences under all stress ratios were more conservative than those obtained experimentally. (Author)

Descriptors :   *Aluminum alloys, *Superalloys, *Steel, *Fatigue(Mechanics), *Fatigue tests(Mechanics), Damage assessment, Heat treatment, Stress analysis, Cyclic tests, Fatigue life, Ratios, Polishing, Test equipment, Mathematical models, Experimental data

Subject Categories : Metallurgy and Metallography
      Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE